Added TODOs for error msgs of non-null fields being null
Fixed the NULL value entries into NON NULL fields. Moved table Account into db EdxPrivate. Hashed the screen names. Added the anon_screen_name to Account entry. No separate table with mapping for now. Added db creation statement generation for Edx and EdxPrivate. Changed transformAndLoad.sh to log in as root while loading, instead of as dataman. This to allow writing to EdxPrivate.Account during load.